NAME
audioce —
SPARC64 EBus CS4231 audio
device
SYNOPSIS
audioce* at ebus?
audio* at audioce?
DESCRIPTION
The audioce device uses the Crystal
Semiconductor CS4231A Parallel Interface, Multimedia Audio Codec chip to
implement the audio device interface described in
audio(4). This device is found onboard on some PCI/EBus based sparc64
models.
The audioce has a maximum precision of 16
bits and has both stereo and monoaural outputs.
MIXER INTERFACE
The mixer(4) interface for audioce
provides the following controls:
outputs.dac- Specifies the attenuation of DAC output. A value of
‘
255’ represents 0 dB attenuation. outputs.dac.mute- Specifies whether DAC output is muted.
outputs.output- Specifies the set of enabled output ports. The output ports are:
‘
line’, the line output jack, ‘hp’, the low impedance headphone jack, and ‘spkr’, the internal speaker. Note: Not all systems support disabling the headphone and line output ports. inputs.cd- Specifies the gain applied to CD audio input. A value of
‘
191’ represents 0 dB. inputs.cd.mute- Specifies whether CD audio input is muted.
inputs.line- Specifies the gain applied to line input. A value of
‘
191’ represents 0 dB. inputs.line.mute- Specifies whether line input is muted.
outputs.monitor- Specifies the attenuation of ADC to DAC output. A value of
‘
255’ represents 0 dB. outputs.monitor.mute- Specifies whether ADC to DAC output is muted.
record.volume- Specifies ADC input gain. A value of
‘
0’ represents 0 dB. record.source- Specifies the active input port for the ADC. The following are valid ADC
input ports: ‘
line’, line input, ‘cd’, CD input, ‘mic’, microphone input, and ‘mixerout’, post-mixer output as heard on the output ports. record.mic_preamp- Specifies whether an additional +20 dB gain is applied to the ADC's microphone input.
SEE ALSO
HISTORY
OpenBSD support for
audioce first appeared in OpenBSD
3.0.